Direct spectroscopic evidence of field-induced solid-state chain conformation transformation in a ferroelectric relaxor polymer
作者： Shihai Zhang , Baojin Chu , Bret Neese , Kailiang Ren , Xin Zhou
DOI: 10.1063/1.2169659
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摘要: Ferroelectric relaxor P(VDF-TrFE-CFE) terpolymer can generate a hysteresis-free polarization of 47mC∕m2 at an electric field 100MV∕m and is attractive for many potential actuating sensing applications. Fourier transform infrared spectra under reveal that this large originates from the field-induced crystalline phase transformation. The nonpolar TGTG′ chain conformation in be converted into polar trans (Tm>4 T3G) high latter effectively aligned to applied direction. Furthermore, transformation completely reversible no hysteresis observed during switching field. In contrast, normal ferroelectric polymer P(VDF-TrFE) exhibits square loop with very small polarization.
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